<?php
class Categories extends Zend_Db_Table_Abstract
{
	protected $_name = 'categories';
	
	public function insert(array $data)
	{
		$data['extra'] = '1';
		return parent::insert($data);	
	}
	
	public function update(array $data, $where)
	{
		throw new Exception('cannot update');
	}
	
	
}
?>